arp strangeness?

[Julian Elischer]

On 5/19/14, 6:36 AM, Ronald F. Guilmette wrote:
> In message <53783271.6090409 at freebsd.org>,
> Julian Elischer <julian at freebsd.org> wrote:
>
>> On 5/18/14, 7:32 AM, Michael Sierchio wrote:
>>> On Sat, May 17, 2014 at 4:30 PM, Ronald F. Guilmette <rfg at tristatelogic.com>
>>> wrote:
>>>
>>>> May 16 23:05:33 segfault kernel: arp: 69.62.255.254 moved from
>>> 00:1e:13:22:eb:51 to 00:00:0e:07:ac:00 on rl0
>>>> May 16 23:05:33 segfault kernel: arp: 69.62.255.254 moved from
>>> 00:00:0e:07:ac:00 to 00:1e:13:22:eb:51 on rl0
>>>> May 16 23:25:29 segfault kernel: arp: 69.62.255.254 moved from
>>> 00:1e:13:22:eb:51 to 00:00:0e:07:ac:00 on rl0
>>>> May 16 23:25:29 segfault kernel: arp: 69.62.255.254 moved from
>>> 00:00:0e:07:ac:00 to 00:1e:13:22:eb:51 on rl0
>>>
>>> Yeah, the router address may be a synthetic address shared by multiple
>>> physical interfaces, or
>>> it may be fictional and handled via multiple interfaces/routers/etc. in
>>> your ISPs fabric running some HA
>>> routing (via OSPF for example).
>> but check with your ISP that your information is current.
>> It may be that you should be using another address and this one is
>> just working by accident.
> Mostly because I am having ongoing connectivity issues, I did in fact
> have a phone conversion, at last, with some actually knowledgable
> person(s) at my ISP (Surewest aka Consolidated Communications), and
> among the many questions I asked, I did also ask if the old (ancient?)
> gateway address I had been using was still the current and proper one,
> and sure enough, no, the current proper one is now the .1 address within
> the /24 I happen to be located in.  So I've changed that now.  (I do
> thank you for the suggestion, but I had already planned to ask them
> if I was using the correct gateway address.)
>
> Oddly, even though I now have the defaultrouter address in my /etc/rc.conf
> file set to the .1 address, _now_ my traceroutes are showing the .2 address
> in this same /24 as the first hop.  Oh well, I'm not going to worry about it.
> I have bigger fish to fry.
it is possible that the router replies with "ONE" of its addreses.. 
not necessarily the one closest to you.
I've seen that before.

> (Specifically, my ISP now informs me that there are definite problems
> with either my ADSL2+ router, or my line, or both, and I will be working
> with them to correct those issues.)
>
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